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John Wiley & Sons, Inc.
Maxine LevarenLike me, you probably thought that the power of a magnet remained the same, no matter what. However, Colin Eldred-Cohen thought that temperature changes would change a magnet’s power, and he undertook a physics project to prove it.
Hypothesis
I believe that the power of magnets is affected by temperature, regardless of magnet type.
Experimental variables
Temperature at which magnets were tested
Measured variables
Amount of material that magnets would pick up
Controls
- Variety of magnets tested
- Material to be picked up
Experimental groups
- Frozen magnets
- Magnets in dry ice
- Boiling magnets
- Baked magnets
Materials
- Iron magnet
- Cobalt magnet
- Alnico magnet
- Ceramic magnet
- BBs
Procedures
With each magnet type, do the following:
- Freeze the magnet for 10 minutes.
- Place the magnet into a tray of BBs.
- Record how many BBs the magnet picks up.
- Place the magnet in dry ice for 10 minutes.
- Place the magnet into a tray of BBs.
- Record how many BBs the magnet picks up.
- Place the magnet in boiling water for 10 minutes.
- Place the magnet into a tray of BBs.
- Record how many BBs the magnet picks up.
- Place the magnet in a 350@dgs oven for 10 minutes.
- Place the magnet into a tray of BBs.
- Record how many BBs the magnet picks up.
Results
All magnets performed the best at room temperature.
Conclusions
My hypothesis was that temperature affects magnetic strength. That was true because the strength of all types of magnets changed depending on the temperature.
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Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state’s handbook of Science Safety.
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